JP2787245B2 - Air supply unit for air conditioning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air-conditioning blow-out unit in which a duct can be connected in a free direction and a wall blow-out or a ceiling blow-out can be selected.

[Prior Art] As disclosed in Japanese Patent Application Laid-Open No. 62-37633, air heated or cooled by a single indoor heat exchanger disposed in the back of a hallway or the like is passed through a duct to each room. An air conditioner that sends air to the outlet unit and returns the air in each room to the indoor heat exchanger through, for example, a door louver and a corridor is economical because only the room used by the damper can be cooled and heated. A relatively small capacity may be used.

The air-conditioning unit as described above includes a blow-off unit mounted on a ceiling surface and a blow-off unit mounted on a wall surface. In the former case, the air is blown downward in any of the cooling and heating.In the latter case, the air is blown out horizontally by the electric motor so as to be blown out horizontally during cooling and obliquely blown down during heating. An adjustable wind direction adjustment unit is incorporated.

As shown in FIG. 4, the conventional air-conditioning blowout unit comprises a box surrounded by a top wall 3, a bottom wall 5, an end wall 4, and a side wall 6 having a substantially square vertical section. And a circular hole 7b is provided in one end wall 4. An outlet 4a projecting from the other end wall 4 and having a width equal to the length of the box 2 and a low height is integrally formed.

As shown in FIG. 5, the air-conditioning blow-off unit
If the outlet 4a is installed so as to open to the wall surface 22,
In the hole of the L-shaped bracket 25 connected to the side wall 6 of the box 2,
Bolts 26 hanging down from the floor 21 are inserted, the nuts are fastened and suspended, and the outlets 4a are opened in the wall surface 22. Circular hole
Connect a duct 24 extending from the outlet of the indoor heat exchanger to 7b,
The circular hole 7a is closed by a lid. Thus, box 2 and duct 24
Is disposed between the floor 21 and the ceiling surface 23.

As shown in FIG. 6, the air-conditioning blow-off unit
When the outlet 4a is mounted so as to open to the ceiling surface 23, the box 2 is hung on the floor 21 so that the outlet 4a is on the lower side, the duct 24 is connected to the circular hole 7a, and the circular hole 7b is connected. To close.

As described above, when the wall outlet is used, since the height of the ceiling space is low, the duct 24 is provided on the end wall 4 opposite to the outlet 4a.
The airflow from the duct 24 is not sufficiently spread in the four directions in the box 2, and the airflow goes straight to the air outlet 4a and blows out to the living room. For this reason, when the wind direction plate of the heating-time outlet 4a is inclined obliquely downward, the blowout noise tends to be extremely large. As a result of various studies of the cause, it was found that the air flowing into the box 2 from the duct 24 flows at high speed almost straight to the outlet, so that the noise reduction effect is small and the noise is increased due to the turbulence of the air flow in the wind direction plate. I got it.

[Problems to be Solved by the Invention] In view of the above-described problems, an object of the present invention is to provide an air-conditioning blowout that has a small overall shape and suppresses noise increase even when the wind direction is inclined obliquely downward in the case of wall blowing. To provide a unit.

[Means for Solving the Problems] In order to achieve the above object, in the configuration of the present invention, an air outlet is provided at an end wall of a box having a flat rectangular cross section and a circular hole is provided at the center of the top wall, An annular mounting plate eccentrically coupled to the end of the elbow in a direction opposite to the bending direction of the start end is coupled to the upper side of the circular hole of the ceiling wall so that the orientation of the start end of the elbow can be selected.

[Operation] The air entering the box from the elbow spreads in four directions in a plane against the bottom wall, and the flow velocity decreases before reaching the outlet, and the wind speed distribution becomes uniform, so that the inclination of the wind direction plate is adjusted. However, blowing noise is greatly reduced.

By eccentricizing the center of the end of the elbow with respect to the circular hole of the box, the wind speed distribution at the outlet is made uniform according to the characteristics of the airflow curved by the elbow.

[Embodiment of the Invention] As shown in Fig. 1, an air-conditioning blow-out unit according to the present invention has a rectangular box whose longitudinal section is long horizontally, that is, a flat box 2 as a whole, and an elbow 8 curved in an L-shape. Consists of The box 2 is a rectangular parallelepiped surrounded by a top wall 3, a bottom wall 5, an end wall 4, and a side wall 6, and one end wall 4 is removed to serve as an outlet, and communicates with the opening of the wall surface 22. A box-shaped airflow direction adjustment unit 9 integrated with a cover 9a that covers a wall surface 22 (see FIG. 5) is fitted into the outlet of the box 2. As shown in FIG. 2, a pair of left and right openings 14 are provided in the cover 9a, and a well-known wind direction plate 13 is disposed in each opening 14 so as to be tiltable about the support shaft 12. An electric motor 10 for adjusting the inclination of the wind direction plate 13 is attached to the inner surface of the central portion of the cover 9a.

As shown in FIG. 1, a circular hole 7 for connecting an elbow 8 is provided at the center of the top wall 3. At the edge of the circular hole 7, a stepped portion 7c slightly recessed from the plate surface of the ceiling wall 3 is formed. The elbow 8 is formed by bending a cylindrical body into an L-shape. A small-diameter portion 8a for fitting a known flexible duct is formed at a start end, and an annular mounting plate 8b is connected to an end by welding. Although the outer shape of the mounting plate 8b is circular to engage with the step 7c, the center of the end of the elbow 8 is eccentric with respect to the center of the mounting plate 8b by e in the bending direction of the starting end of the elbow 8. The mounting plate 8b of the elbow 8 is superimposed on the step 7c of the ceiling wall 3 and is joined by bolts (not shown). At this time, the end of the elbow 8 is eccentrically connected to the circular hole 7 of the top wall 3 in the bending direction of the start end.

As shown in FIG. 3, when the air-conditioning blowout unit according to the present invention is used as a wall blowout, it is hung on floors of living rooms A and B by known means. Flexible duct 2 like rooms A and B
The direction of the elbow 8 can be freely changed according to the direction of the terminal end of 4. When the air-conditioning blow-off unit is a ceiling blow-off, the elbow 8 is used when the end of the flexible duct 24 is parallel to the top wall 3 as in the living rooms C and D, and the air duct is perpendicular to the top wall 3. Sometimes the flexible duct 24 is directly inserted into the circular hole 7 without using the elbow 8.
Connect to

For example, the air introduced into the distribution box 18 by the blower 19 from the indoor heat exchanger 17 disposed on the floor of the corridor 16 (behind the ceiling)
The damper 20 is introduced into the box 2 through the open flexible duct 24, and is blown out from the outlet 4a into the living room B to cool and heat the living room B. The air in living room B passes through the looper of door 30 and passes through corridor 16
To the indoor heat exchanger 17.

As shown in FIG. 1, the air which has entered the inside of the box 2 from the elbow 8 through the circular hole 7 of the top wall 3 hits the bottom wall 5, spreads along the bottom wall in four directions, the wind speed decreases, and eventually the wind direction It is blown out to the living room through the board 13. The air turned 90 degrees by the elbow 8 tends to be biased to the left in FIG. 1 due to inertia. However, since the end of the elbow 8 is eccentrically connected to the circular hole 7 provided at the center of the top wall 3, the air volume expanding in four directions from the bottom wall surface is corrected, and the wind speed expanding in four directions along the bottom wall surface is reduced. Almost uniform. Therefore, the wind speed when passing through the wind direction plate 13 is low, the wind speed distribution of the outlet 4a is substantially uniform, and the blowing noise is reduced.

The air-conditioning blowout unit according to the present invention is particularly effective in the case of wall blowout, but can be changed to ceiling blowout if the entire unit is tilted 90 degrees.

[Effects of the Invention] As described above, the present invention provides an outlet at the end wall of a box having a flat rectangular cross section and a circular hole at the center of the top wall,
An annular mounting plate that is eccentrically coupled to the end of the elbow in the direction opposite to the curved direction of the start end is connected to the top of the top wall circular hole so that the orientation of the start end of the elbow can be selected and then inserted into the box from the elbow. The trapped air spreads flatly against the bottom wall, and the flow velocity decreases before reaching the air outlet. Therefore, even if the inclination of the wind direction plate is adjusted, the blowing noise is significantly reduced as compared with the conventional example.

Since the box is flat, the overall shape is reduced, and in the case of side blowing, sufficient space is provided between the floor and the top wall of the box for connecting a duct via an elbow.

By changing the direction of the elbow, the direction of connection of the duct connecting the indoor heat exchanger and the elbow is free, and piping with low fluid resistance can be easily formed.

By eccentricizing the center of the end of the elbow with respect to the circular hole of the box, the wind speed distribution inside the box is made uniform according to the characteristics of the airflow curved by the elbow.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an air-conditioning blow-off unit according to the present invention, FIG. 2 is a front view of a wind direction adjusting unit, FIG. 3 is a plan view showing an attached state of the air-conditioning blow-off unit, and FIG. FIG. 5 is a side cross-sectional view showing a mounting state of a wall outlet of the air conditioning unit, and FIG. 6 is a side cross-sectional view showing a mounting state of a ceiling unit of the air conditioning unit. FIG. 2: Box, 3: Top wall, 4: End wall, 4a: Air outlet, 7: Circular hole, 8: Elbow, 8b: Mounting plate

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24F 3/00 F24F 13/06

Claims (1)

(57) [Claims] 1. A rectangular box having a flat rectangular cross section with an outlet at the end wall and a circular hole at the center of the top wall, and an elbow end eccentrically connected to the end opposite to the curved direction of the start end. An air-conditioning blow-off unit, characterized in that the mounting plate is connected to the upper side of the circular hole of the ceiling wall by overlapping the direction of the starting end of the elbow so as to be selectable.